1.3.7.4	(3Z)-phytochromobilin + oxidized ferredoxin	-	
1.3.7.4	(3Z)-phytochromobilin + oxidized ferredoxin	biosynthesis of bilin pigments	
1.3.7.4	biliverdin IXalpha + 2 reduced ferredoxin	-	
1.3.7.4	biliverdin IXalpha + reduced ferredoxin	-